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arXiv 0912.0888math.APmath.CA
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无角截断Boltzmann方程的整体强解

Global Strong Solutions of the Boltzmann Equation without Angular Cut-off

Philip T. Gressman, Robert M. Strain

摘要:

我们证明了无角截断的Boltzmann方程在时间上整体强解的存在性和指数衰减性,即,for long-range远程interactions互动.我们考虑麦克斯韦平衡态的扰动,包括从逆幂分子间势$r^{-(p-1)}$与$p>3$产生的物理截面,更一般地说,角奇点的全范围$s=ν/2 \in(0,1)$。这些似乎是第一个独特的全球解决方案,这一根本性的重要模型,它授予一个基本的例子,一系列的几何分数导数发生在自然世界的物理模型。我们的方法提供了一个新的理解在玻尔兹曼理论的掠碰撞的影响。

英文摘要:

We prove the existence and exponential decay of global in time strong solutions to the Boltzmann equation without any angular cut-off, i.e., for long-range interactions. We consider perturbations of the Maxwellian equilibrium states and include the physical cross-sections arising from an inverse-power intermolecular potential $r^{-(p-1)}$ with $p>3$, and more generally, the full range of angular singularities $s=ν/2 \in(0,1)$. These appear to be the first unique global solutions to this fundamentally important model, which grants a basic example where a range of geometric fractional derivatives occur in a physical model of the natural world. Our methods provide a new understanding of the effects of grazing collisions in the Boltzmann theory.

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